Zoo Design Studio: Recursive KCL parsing is vulnerable to denial-of-service
Priority LOW 38CWE-770Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- Denial of service
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-770.
Summary
### Impact Feeding a KCL program that wraps an expression in deep, unnecessary parentheses triggers the parser’s recursive `expression` -> `unnecessarily_bracketed` -> `expression` path. With enough nesting, the call stack grows until it exceeds the process stack limit, causing a stack overflow.
Why it matters now
Fix Fixed zoo-kcl (PyPI): 0.3.129kcl-lib (crates.io): 0.3.129
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | zoo-kcl (PyPI) | before 0.3.129 | 0.3.129 | Patch available | GHSA-jgvr-6x5w-hx5w |
| — | kcl-lib (crates.io) | before 0.3.129 | 0.3.129 | Patch available | GHSA-jgvr-6x5w-hx5w |
- zoo-kcl (PyPI) Vendor— Affected before 0.3.129 Fixed in 0.3.129 Patch available GHSA-jgvr-6x5w-hx5w
- kcl-lib (crates.io) Vendor— Affected before 0.3.129 Fixed in 0.3.129 Patch available GHSA-jgvr-6x5w-hx5w
Remediation
- Fix · GHSA-jgvr-6x5w-hx5w zoo-kcl (PyPI) Fixed in 0.3.129 Advisory →
- Fix · GHSA-jgvr-6x5w-hx5w kcl-lib (crates.io) Fixed in 0.3.129 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-jgvr-6x5w-hx5w
References
Sources
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